streaming: Adjust the frame rate based on the GStreamer encoding time
streaming: Adjust the frame rate based on the GStreamer encoding time

Signed-off-by: Francois Gouget <6b915da68578f6eb004fe99432b967565fc9be8f@codeweavers.com>

fgouget/spice,fgouget/spice,fgouget/spice,fgouget/spice